Fishing tool



Dec. 2s, 192e P. G. LEONARD FISHING TOOL Filed April 2, 1926 Iltventor: Peter Gustar Leonard Witnesses Patented Dec. 28, 1926.

UNITED stares rarest erstes.`

FISHING TOOL.

Application filed April 2, 1926.

My present invention relates to fishing tools, and it has for its general object to provide an improved type of fishingtool it'or use in connection with oil wells, to engage and withdraw large couplings or unions, especially where the clearance space between the couplings or unions and the tubing containing the same is relatively small.

A Jfurther objectof the invention is to provide an improved construction of means for obtaining the foregoing object through the instrumentality of a socket member arranged to beslipped through the clearance space and to be closed under the coupling or union for a straight upward lift of the same from the Well.

'A still further object is Lto provide a novel releasable means for effecting the closing of the socket member, such releasable means being arranged to be set free through the actuation of plunger means arranged to encounter the coupling or union to be recovered.

Other objects will appear hereinafter. Y

The invention consists in the combinations and arrangements of parts hereinafter.. described and claimed.

The invention will be best understood Vby reference to the accompanying drawing forming apart of this specification, and in which,

Fig. 1 represents an elevational view of a ishing vtool made in accordance with the present invention, the tubular body being shown in the position it occupies for securing the holding fingers in yposition for the recovery of the entrapped coupling;

Fig. 2 represents a longitudinal section taken substantially on the line 2-2 of Fig. 1, but showing the tubular body upheld by the locking dogs and showing also a coupling or union within the socket member in position.

to be encountered by the contact for the rem lease of the dogs;

Fig. 3 represents an enlarged sectional view, showing in particular the arrangement of the locking dogs and of the plunger by which the dogs are released; and 4 Fig. 4 represents a cross section taken substantially'on the line 4-4 of Fig. 3.

My improved shing tool, in its preferred term of construction, as illustrated in the Serial No. 99.191.

accompanying drawing, coi'nprises a main cylindrical body 5 having at its top end a suitable threaded region 6 by which lto be 'A for the compression of a spring 1() coiled.

about the main body and having bearing against the Jflange 11 of 'a ring 12 .slidably fitting the main body 5. Y l

Screw threaded to the ring 12 is a tubular body 13 which surrounds the main body 5 and also a socket member 111i.A At its upper end the socket member 141 is screw threaded at 15 to the lower end or head 16 of the main body from which it depends. At its lower end the depending socket member 141 is provided with spaced vslits or openings 17 to kproduce the spring holding lingers 18.` At their fr ee ends the holding lingers 18 are made wlthinner supporting lugs 19 whoseV faces are beveled upwardly and inwardly as shown so as to adapt the socketV member, while being lowered in the well tubing to slip over a rod joint or coupling as 2O for entrapping the samel within the socket member. The construction, arrangement and proportion of these parts are vsuch that when the ring 12with the tubular body is upheld upon the main body by means of the dogs 21, the holding fingers 18 will be unlocked and free to be passed about a coupling or union as 20; and that when the ring and tubular body has dropped because of the release of the dogs '21 Aand the consequent `expansion of the spring 10, the holding fingers. 1S will be locked together hy the tubular body 13 so that'the supporting lugs l19 willV engage under the coupling or union 2O for the recovery of the same.V

As best illustrated in Fig. 3, vthere are two dogs 21 which are arranged inopposcd relation upon pins 22 for operation in suitable slots 23 cut in the main body 5. The confronting` sides of the dogs 21 are provi-deo'. with projecting lugs 24 designed to serve as guides for a coiled spring 25 interposed between and in with as shown, so as to normally pivot the dogs upon their pins into position to interlock with suitable notches 26 cut for the inirpose in the wall of' the ring,` l2. These dogs are so arranged and proportioned that when the top outer corners thereof are engaged with the notches 25, the lower camlike ends thereof will be in close proximity for sin'iultaneous engagement by the upper tapered end 27 of the plunger 28, by means of which the dogs are swung on their pivots soy as to. release the ring' l2.V rThe plunger 28 is slidably litter, in a suitable bore 29 extendingupwardly and centrally of the main body from a recess 30 at the lower end thereof. The plunger extends into the space wit-hin the socket men'iber lll and is provided with a contact head 3l which is adapted to encounter th coupling or union 2O by which the plunger is moved against the urge'of a positioning)r spring 32 which is coiled around the plunger and imprisoned between the bottom wall of the recess 30 and the head 3l, the extent of movement of the plunger beine' limit ed by a pin 33 arranged in the. main body and extending into a keyway 34; provided for the purpose in the plunger.

From the foregoing description, taken in connection with the accompanying` drawing, it will be evident that in setting` my improved fishing` tool for use, the dogs are first. engaged in the notches in the ring` 12 and then the spring l() is suitably compressed by means of the collar 8 threaded upon the main body. The tool is then entered in the well and manipulated until the coupling or union, upon being entrapped within the socket member lll, encounters the plunger by which the dogs are simultaneously actuated for the release of the ringY and tubularbody.

llVhile l have illustrated and described theV prefer-red form of construction for carrying;`

my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. l, therefore, do not wish topbe limi-ted to the precise details of construction set forth, butV desire to avail myself of such variations and modifications as come within the scope of the appended claims.

.lllavingi` described my invention, what I cla im as new and desire to'secureby Letters Patent is:

l. A coupling pulling; device comprising a main body and a tubular body arranged for relative sliding movement; dog' means rockably mounted within rand protruding'v from the main body for vreleasably upholding the tubular body on the main bot y; and a socket member depending from the main body and having lift lingers arranged to be actuated by the tubular bodyA upon'the release therefrom of said dogs, substantially as described.

2. A coupling pulling` device comprisinga main body provided with a depending socket member having lift lingers: a spring pressed tubular body slid-.ably arranged on the main boi y: a pair of dogs rockably mounted Ywithin and protruding; from the main body for releasably upholding' the tubular body thereon: and means for effecting' the release of said dogs from said tubular body, substantially as described.

3. coupling pullingl device comprising a main body; a tubular body movable thereon; releasing` means on the main body interlocking' with the tubular body: a collar threaded on the main *body a spring coiled on the main body and imprisoned between said collar and tubular body; a socket member on the main body provided with lifting' lingers arranged to vbe actuated by the tubular body; and means for operating the releasing means, substantially as described.

t. A coupling pulling device comprising a main body/f; a tubular body movable there-V on; rel-easing` means on the malnf body inter# locking with the tubular body; a collar threaded on the main body; a' spring coiled on the main body and imprisoned between said collar and tubular body; a socket memheron the main body provided with lifting ngers arranged lto be actuated by the tubular body; and means for operating the releasing,l means comprising a springl positioned plunnerin the main body provided with a head located in the socket member, substantially 'as described.

5. In a coupling pulling device, a 'main body; a tubular Vbody movably fitting the same; a pair of dogs pivotedf in themain body and engaging notches` in the tubular body .for releasably securing the 'tubular body :v a collar threaded on the main body; a spring on the main body imprisoned between said collar and tubular body; and a ilalung'er in the main body arranged to trip said'dogjs from said notches to allow said spring to force the movementof saidtubular body, Vsulistantially as described.

6. A coupling pulling device comprising a main body; a tubular body movably fitting thesame; a pair of dog-s pivoted in the main body and engagingv` notches Vin the tubular body for releasably securingV theV tubular Y body; a collar threaded on the mainI body; a spring on the main body imprisoned between said collar and tubular bod-y; Vmeans for tripping said dogs troniy il notches to allow said spring to force i.nofvement of said tubular body; andV a socket Lmember on the main body havingy lift fingers arrangedy to be engaged and` actuated bythe released and spring forced tubular body, substantially as described.

7. A coupling,` pulling device comprising," a main body; a ring; slidable thereon; a tubular body surrounding the main bodyand fixed to said ring; dogs pivoted in the main body and engaging notches in the ring; la spring on the main body bearing on said ring; a socket member fixed to the main body and projecting from the tubular body; lift fingers on the projecting end of the socket member arranged to ybe actuated by said tubular body; and means positioned in the socket member and extending into the main body for tripping `said dogsto allow said Spring to force the movement of said tu- 10 bular body, substantially as described.

In testimony whereof I have signed my name to this specification.

PETER GUSTAF LEONARD. 

